1 #ifndef HW_SYSBUS_H 2 #define HW_SYSBUS_H 3 4 /* Devices attached directly to the main system bus. */ 5 6 #include "hw/qdev.h" 7 #include "exec/memory.h" 8 9 #define QDEV_MAX_MMIO 32 10 #define QDEV_MAX_PIO 32 11 12 #define TYPE_SYSTEM_BUS "System" 13 #define SYSTEM_BUS(obj) OBJECT_CHECK(BusState, (obj), TYPE_SYSTEM_BUS) 14 15 typedef struct SysBusDevice SysBusDevice; 16 17 #define TYPE_SYS_BUS_DEVICE "sys-bus-device" 18 #define SYS_BUS_DEVICE(obj) \ 19 OBJECT_CHECK(SysBusDevice, (obj), TYPE_SYS_BUS_DEVICE) 20 #define SYS_BUS_DEVICE_CLASS(klass) \ 21 OBJECT_CLASS_CHECK(SysBusDeviceClass, (klass), TYPE_SYS_BUS_DEVICE) 22 #define SYS_BUS_DEVICE_GET_CLASS(obj) \ 23 OBJECT_GET_CLASS(SysBusDeviceClass, (obj), TYPE_SYS_BUS_DEVICE) 24 25 /** 26 * SysBusDeviceClass: 27 * @init: Callback function invoked when the #DeviceState.realized property 28 * is changed to %true. Deprecated, new types inheriting directly from 29 * TYPE_SYS_BUS_DEVICE should use #DeviceClass.realize instead, new leaf 30 * types should consult their respective parent type. 31 * 32 * SysBusDeviceClass is not overriding #DeviceClass.realize, so derived 33 * classes overriding it are not required to invoke its implementation. 34 */ 35 36 #define SYSBUS_DEVICE_GPIO_IRQ "sysbus-irq" 37 38 typedef struct SysBusDeviceClass { 39 /*< private >*/ 40 DeviceClass parent_class; 41 42 /* 43 * Let the sysbus device format its own non-PIO, non-MMIO unit address. 44 * 45 * Sometimes a class of SysBusDevices has neither MMIO nor PIO resources, 46 * yet instances of it would like to distinguish themselves, in 47 * OpenFirmware device paths, from other instances of the same class on the 48 * sysbus. For that end we expose this callback. 49 * 50 * The implementation is not supposed to change *@dev, or incur other 51 * observable change. 52 * 53 * The function returns a dynamically allocated string. On error, NULL 54 * should be returned; the unit address portion of the OFW node will be 55 * omitted then. (This is not considered a fatal error.) 56 */ 57 char *(*explicit_ofw_unit_address)(const SysBusDevice *dev); 58 void (*connect_irq_notifier)(SysBusDevice *dev, qemu_irq irq); 59 } SysBusDeviceClass; 60 61 struct SysBusDevice { 62 /*< private >*/ 63 DeviceState parent_obj; 64 /*< public >*/ 65 66 int num_mmio; 67 struct { 68 hwaddr addr; 69 MemoryRegion *memory; 70 } mmio[QDEV_MAX_MMIO]; 71 int num_pio; 72 uint32_t pio[QDEV_MAX_PIO]; 73 }; 74 75 typedef void FindSysbusDeviceFunc(SysBusDevice *sbdev, void *opaque); 76 77 void sysbus_init_mmio(SysBusDevice *dev, MemoryRegion *memory); 78 MemoryRegion *sysbus_mmio_get_region(SysBusDevice *dev, int n); 79 void sysbus_init_irq(SysBusDevice *dev, qemu_irq *p); 80 void sysbus_pass_irq(SysBusDevice *dev, SysBusDevice *target); 81 void sysbus_init_ioports(SysBusDevice *dev, uint32_t ioport, uint32_t size); 82 83 84 bool sysbus_has_irq(SysBusDevice *dev, int n); 85 bool sysbus_has_mmio(SysBusDevice *dev, unsigned int n); 86 void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq); 87 bool sysbus_is_irq_connected(SysBusDevice *dev, int n); 88 qemu_irq sysbus_get_connected_irq(SysBusDevice *dev, int n); 89 void sysbus_mmio_map(SysBusDevice *dev, int n, hwaddr addr); 90 void sysbus_mmio_map_overlap(SysBusDevice *dev, int n, hwaddr addr, 91 int priority); 92 void sysbus_mmio_unmap(SysBusDevice *dev, int n); 93 void sysbus_add_io(SysBusDevice *dev, hwaddr addr, 94 MemoryRegion *mem); 95 MemoryRegion *sysbus_address_space(SysBusDevice *dev); 96 97 /** 98 * sysbus_init_child_obj: 99 * @parent: The parent object 100 * @childname: Used as name of the "child<>" property in the parent 101 * @child: A pointer to the memory to be used for the object. 102 * @childsize: The maximum size available at @child for the object. 103 * @childtype: The name of the type of the object to instantiate. 104 * 105 * This function will initialize an object and attach it to the main system 106 * bus. The memory for the object should have already been allocated. The 107 * object will then be added as child to the given parent. The returned object 108 * has a reference count of 1 (for the "child<...>" property from the parent), 109 * so the object will be finalized automatically when the parent gets removed. 110 */ 111 void sysbus_init_child_obj(Object *parent, const char *childname, void *child, 112 size_t childsize, const char *childtype); 113 114 /* Call func for every dynamically created sysbus device in the system */ 115 void foreach_dynamic_sysbus_device(FindSysbusDeviceFunc *func, void *opaque); 116 117 /* Legacy helper function for creating devices. */ 118 DeviceState *sysbus_create_varargs(const char *name, 119 hwaddr addr, ...); 120 DeviceState *sysbus_try_create_varargs(const char *name, 121 hwaddr addr, ...); 122 static inline DeviceState *sysbus_create_simple(const char *name, 123 hwaddr addr, 124 qemu_irq irq) 125 { 126 return sysbus_create_varargs(name, addr, irq, NULL); 127 } 128 129 static inline DeviceState *sysbus_try_create_simple(const char *name, 130 hwaddr addr, 131 qemu_irq irq) 132 { 133 return sysbus_try_create_varargs(name, addr, irq, NULL); 134 } 135 136 #endif /* HW_SYSBUS_H */ 137